Between 70% and 80% of resumes submitted to corporate job postings are rejected by an ATS before a recruiter ever sees them. The most common reason is not that candidates are unqualified — it's that their resume fails a technical scan that has nothing to do with their actual fit for the role.
What follows is not "tailor your resume to the job description" advice. You already know that. These are the specific, mechanical changes that move ATS scores — the kind of changes that take a resume from filtered out to ranked in the top 20%.
1. Use the exact keyword, not the synonym
ATS systems are string-matching engines first. Most do not infer that "machine learning" and "ML" mean the same thing, or that "JavaScript" and "JS" are equivalent. If the job description says "Python," your resume needs the word "Python" — not "scripting" or "automation" or "data pipelines."
The fix: read the job description and copy its exact phrasing into your resume wherever accurate. If the JD uses both "ML" and "machine learning," include both. The extra 8 words cost you nothing and can add 10–15 ATS points.
2. Put keywords in experience bullets, not just the skills section
ATS systems weight keyword location. A keyword in your skills section scores lower than the same keyword embedded in an experience bullet with context. "Built customer-facing dashboard in React + TypeScript with GraphQL API, reducing page load time by 40%" scores higher than just "React, TypeScript, GraphQL" listed under skills.
The fix: for every technical skill the JD requires, make sure it appears at least once inside an experience bullet, not only in your skills list.
3. Submit as .docx, not PDF — unless the posting says otherwise
PDF text extraction fails more often than most candidates realize. ATS parsers read PDFs by extracting embedded text, and the extraction degrades with complex formatting, multi-column layouts, icons, and tables. A .docx file is parsed by reading structured XML — far more reliable.
The exception: some postings explicitly request PDF. In that case, submit PDF. But if the posting does not specify, .docx is the safer choice for ATS parsing.
4. Use standard section headers
ATS systems categorize resume content by section. They know "Work Experience" and "Professional Experience." They often do not know "Where I've Been" or "My Story" or even unusual variants like "Career History." When the parser cannot identify a section, it either ignores the content or miscategorizes it — costing you keyword credit for everything in that block.
Stick to: Work Experience / Professional Experience, Education, Skills, Summary or Professional Summary, Certifications. That is all you need.
5. Spell out acronyms on first use
Different job postings — and different ATS systems — use acronyms inconsistently. Write "Search Engine Optimization (SEO)" the first time, then use "SEO" thereafter. This ensures your resume matches both the acronym version and the spelled-out version in the ATS index, doubling your coverage for that keyword.
6. Avoid tables, text boxes, and headers/footers for key content
Tables and text boxes are common in resume templates that look polished in Word or Google Docs. The problem is that ATS parsers often skip table cells or extract them out of order. Headers and footers (where some candidates put their contact information) are frequently ignored entirely by ATS parsers — meaning the system may not even know whose resume it is processing.
Move all important content — especially contact information, job titles, and skills — into the main body of the document. Use plain text or simple bullet formatting.
7. Match your job title to the posted title (where honest)
If your last role was "Software Development Engineer" and the posting says "Software Engineer," and those titles genuinely describe the same level of work, use "Software Engineer" on your resume. Job titles are not standardized across companies. ATS systems often search by exact title match. Using the industry-standard term instead of your company's internal title can mean the difference between appearing in a recruiter search result and not.
8. Include a keyword-rich summary section at the top
The first 100–150 words of a resume are read first — by both ATS systems and humans. A 3–4 sentence professional summary that includes your target role, your most relevant skills, and the industry you work in gives the ATS high-confidence signal early. It also gives a recruiter a 10-second reason to keep reading.
Do not use the summary as a generic "results-oriented professional seeking opportunities." Write a specific statement: "Software engineer with 6 years building distributed backend systems in Go and Python. Experience with Kubernetes, GCP, and high-throughput data pipelines. Most recently led infrastructure work supporting 10M+ daily users at [Company]."
How to know if your resume is passing the filter
The only way to know your ATS score before submitting is to run your resume against the actual job description. Applyr's free ATS checker does exactly that — paste your resume and the job description, get your match percentage, and see the specific keywords you're missing. It takes about 8 seconds and requires no account.
Run your resume against the next three job descriptions you plan to apply to. You will almost certainly find at least one keyword gap you can close in under 5 minutes.